BACKUP /etc/fstab to fstab.bak THEN sudo gedit /etc/fstab and add line :

//192.168.1.fff /mnt/Router username=xxx,password=yyy,uid=pi,gid=pi 0 0
sudo mount -a (to then run the fstab file) (add it to bottom of .bashrc file to automount as boot of fstab occurs before network available.

By using internet speedtest under a variety of the settings the following was found (this may not hold true in the future but its what seemed to make sense at the time) :

1 Wireless WMM (QoS)

Enabling QoS means that VOIP/videos/games take priority and can cause issues for web browsers when gaming is in progress. Heavy gaming seems to even stop connection to the wireless network (at that time the specific game causing problems was DOTA 2).

Switching off QoS leaves all network connections the same access to the internet causing lag problems for game users/video watchers.

2 Channel

Channel (1,6,9,11 are supposedly best for less interference) Is significant with 6 significantly better on the 2.4GHz band for our particular wifi network at the current time. Wireless phones and microwave may interfere along with other local wifi networks.

Unsure of 5GHz band cos not sure what uses it, channels 36,40,44,48 recommended so stuck it at 40 (from 112)